Weak decays of doubly heavy baryons: SU(3) analysis
Weak decays of doubly heavy baryons: SU(3) analysis
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DOI：
10.1140/epjc/s10052-017-5363-y
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发表时间：
2017-07
期刊：
影响因子：
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通讯作者：
Wei Wang;Zhi-Peng Xing;Ji Xu
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文献类型：
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作者：
Wei Wang;Zhi-Peng Xing;Ji Xu
受最近LHCb观测到的双粲重子终态的启发，我们分析了双重重子，，，，和在SU(3)对称下的弱衰变。各种半轻子和非轻子衰变的衰减幅度用几个SU(3)不可约的幅度来参数化。我们发现了衰变宽度和CP不对称之间的一些关系或求和规则，这些关系或求和规则可以在LHC、Belle II和CEPC等实验设施的未来测量中进行检验。此外，一旦将来测量到一些衰变分支分数，其中一些关系可能为探索新的衰变模式提供线索。
Motivated by the recent LHCb observation of doubly charmed baryonin thefinal state, we analyze the weak decays of doubly heavy baryons,,,,andunder the flavor SU(3) symmetry. The decay amplitudes for various semileptonic and nonleptonic decays are parametrized in terms of a few SU(3) irreducible amplitudes. We find a number of relations or sum rules between decay widths and CP asymmetries, which can be examined in future measurements at experimental facilities like LHC, Belle II and CEPC. Moreover, once a few decay branching fractions have been measured in the future, some of these relations may provide hints for exploration of new decay modes.